Troubleshooting Flash Code 83, PID 411/FMI 0
Flash code 83, p 411/0 indicates that the EGR Delta pressure is high. These conditions are typically:
- EGR valve stuck open
- EGR valve stuck partly open
For all EGR related codes, always refer to "20.18 Exhaust Gas Recirculation System Basic Checks for Series 60 Engines" and perform the exhaust gas recirculation system checks.
Check for an EGR Valve Stuck Open or Partly Open
This same procedure may be found in the Series 60 EGR Technician's Guide 7SE60 as Test A.
Check for a stuck EGR valve as follows:
- Remove the turbocharger to charge-air-cooler (CAC) pipe.
PRESSURIZED CHARGE COOLER SYSTEM
To avoid eye or face injury from flying debris, wear a face shield or goggles.
- Pressurize the CAC inlet to 207 kPa (30 psi) using special tool TLZ00100 or equivalent.
- Using DDDL, monitor the boost psi.
- If the pressure is below 187 kPa (27 psi), visually inspect the CAC, hoses, and the delivery tube for leaks. Repair as necessary.
- If the pressure is 187 kPa (27 psi) or higher, continue to step 4 .
- Disconnect the EGR actuator oil lines.
Note: The oil line fitting is a 37 degree JIC #6 fitting.
- Connect a regulated air supply line to the EGR actuator regulated to 69 kPa (10 psi).
- Using DDDL, activate EGR (PWM #2) to 90%.
- Monitor the boost kPa (psi) pressure for pressure drops when the EGR valve opens.
Note: The pressure should have dropped significantly to approximately 62 kPa (9 psi) or less.
- Physically inspect the EGR valve for a mechanical failure. If the EGR valve is not functioning correctly, replace the EGR valve.
Check the Delta P Sensor
This same procedure may be found in the Series 60 EGR Technician's Guide (7SE60) as part of Test C.
Check the Delta P Sensor as follows:
- Remove the Delta P Sensor from the mounting plate.
To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure.
- Blow down through the sensor tubes (by way of the holes in the mounting plate) using an airline.
- Gently shake the sensor to remove any moisture before reinstalling the sensor. Moisture in the sensor does not cause permanent damage.
- Turn the ignition ON (key ON, engine OFF).
- Connect either Detroit Diesel Diagnostic Link (DDDL) or the Diagnostic Data Reader (DDR).
- Read the Delta P counts.
- If the Delta P counts read 86–118, verify that the Venturi Tube hoses-to-Delta P Sensor, are correctly installed and are not damaged. Repair as necessary, verify repairs. Also visually inspect the delivery pipe for damage and proper assembly. Repair as necessary, verify repairs. Refer to "220.127.116.11 Verify Repairs"
Note: Reversed and damaged hoses will have an adverse effect on engine performance resulting in black exhaust smoke and engine surging.
- If the Delta P counts are out of the 86–118 range, replace the sensor. Refer to "18.104.22.168 Verify Repairs" .
- If the Delta P counts read 86–118, verify that the Venturi Tube hoses-to-Delta P Sensor, are correctly installed and are not damaged. Repair as necessary, verify repairs. Also visually inspect the delivery pipe for damage and proper assembly. Repair as necessary, verify repairs. Refer to "22.214.171.124 Verify Repairs" .
Perform the following steps to verify repairs for the EGR valve:
- Connect all connectors.
- Start and run the engine.
- Road test the engine.
- If code 83 was not logged, no further troubleshooting is required.
- If code 83 was logged, please review this section from the first step to find the error. Refer to "75.2.1 Check for an EGR Valve Stuck Open or Partly Open" . If this is the second time through the procedure, call Detroit Diesel Customer Support Center (313–592–5800) or try a test ECM/ECU.
|Series 60 DDEC V Troubleshooting Guide - 6SE570|
|Generated on 10-13-2008|